And when even was now come, His disciples went down unto the sea, and entered into a ship, and went over the sea toward Capernaum. And it was now dark, and Jesus was not come to them.  And the sea arose by reason of a great wind that blew.  So when they had rowed about five and twenty or thirty furlongs, they see Jesus walking on the sea, and drawing nigh unto the ship: and they were afraid.  But he saith unto them, “It is I; be not afraid.”  Then they willingly received Him into the ship: and immediately the ship was at the land whither they went.
John 6:16-21